The X-LOCK R444 Expert for Metal Fibre Disc produces an impressive finish on metal surfaces. It features a stable Vulcanised fibre backing that enables a consistent grinding process. Its aluminium oxide grain is particularly suited for work on metal applications. X-LOCK sanding discs also fit standard angle grinders. Changing fibre discs is fast and convenient thanks to the keyless X-LOCK system. Discs are suitable for clamping on an X-Lock or standard rubber backing pad. Features and Benefits Stable vulcanised fibre backing enables a consistent grinding process Typical Applications: Sanding and blending of ferrous and non ferrous steel Aluminium oxide grain is particularly suited for work on metal applications Fully synthetic resin bonding on vulcanised fibre backing gives high work stability and optimal sanding results